Risperidone is a second-generation antipsychotic medication that is effective and well-tolerated for treating tantrums, aggression, and self-injurious behavior in children with autism spectrum disorder. However, its use is highly controversial due to adverse effects like weight gain, hormonal issues, and long-term neurological problems. Risperidone's efficacy and side effects depend on factors like genetics and drug interactions, requiring close monitoring by medical professionals when used in autistic children.